Stone-sawing machine.



No. 804,812. PATENTED NOV. 14, 1905. J. A. HALL & B. B. CHANDLER. STONE SAWING MACHINE.

APPLICATION FILED 211.11, 1905.

2 SHEETS-SHEBT 1.

No. 804,812. PATENTED NOV. 14:, 1905. J. A. HALL & B. B. CHANDLER.

STONE SAWING MACHINE.

APPLIOATION FILED APR.11, 1905.

2 SHEETSSHBBT 2.

UNITED STATES I PATENT OFFICE.

JOHN ADAMS HALL AND BARTLETT B. CHANDLER, OF SACRAMENTO,

CALIFORNIA, ASSIGNORS TO V. S. MoCLATCHY, TRUSTEE, OF SAC- RAMENTO, CALIFORNIA.

STONE-SAWING MACHINE.

lvo. 804,812.

Original application filed September 26, 1904, Serial No. 225,919. Divided and this application filed April 11, 1905. Serial No. 254,986.

To all whom it may concern:

Be it known that we, JOHN ADAMS HALL and BARTLETT B. CHANDLER, citizens of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented new and useful Improvements in Stone-Sawing Machines, of which the following is a specification, the same being a division of our original application, Serial No. 225,919, filed September 26, 1904.

Our invention relates to stone-sawing machines, and especially to machines employing chilled shot as an abrading medium.

The object of the present invention is particularly to provide suitable means for automatically feeding the shot to the saws, for. collecting the shot, washing it, and conveying it once more into position ready for refeeding.

The invention consists of the parts and the construction and combination of parts, as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a side elevation of our saw, showing the side of the trough 49 and the perforated pipe 57 removed to disclose the conveyer. Fig. 2 is an end elevation of the same. Fig. 3 is an enlarged sectional view of trough and valve.

A represents a suitable framework supporting the various parts of the apparatus. Suitably supported in this framework for reciproeating movement is the saw, consisting of the bar 2 and the blades 3. The blades are of usual rectangular plate construction, and the cutting of the stone is done by feeding fine chilled shot along with a suflicient supply of water into the path of the blades during the reciprocation of the saw, the action of the blades rubbing upon the shot and bearing upon it continually to wear away the stone. Our invention comprehends the automatic feed of the shot, the gathering of it up, washing it, and returning it to a convenient point, whence it may pass again to the saws. For this purpose we show an overhead trough 49 running lengthwise of the saw-frame andhaving a number of outlets in its bottom corresponding to the number of saw -.blades to which the shot is to be fed. A suitable valve, as the plug 50, is disposed in each outlet to regulate the amount of shot and water that may pass to any blade. Connected with each Specification of Letters Patent.

Patented Nov. 14, 1905.

outlet is a depending flexible tube or hose 51. A rigid tube 52 is slipped into the lower end of this hose, and a smaller rigid tube 53 telescopes with tube 52. The tube 53 slips into the upper end of a hollow bolt or connection 41, which is just between the saw-blades, so that the shot and water from trough 49 may be fed directly into the path of and between the individual saw-blades. If. desired, the end of tube 53 may have a flange 54 to limit its movement into the bolt 41. The flexible hose connection 51 and the telescoping tubes 52 53 allow the shot and water to be fed continuously irrespective of the reciprocations of the saw. The shot is distributed the length of trough 49 by suitable carrier means, as the conveyer 55, having the scrapers 56. Water is fed into the trough at convenient space intervals from the perforated pipe 57. The conveyer 55 passes over sprockets or drums 58 and 58, and motion is transmitted thereto by any convenient means. As shown, the shaft of drum 58 carries a pulley around which passes a belt 59 to a pulley 60 on drive-shaft 13. The shot which is driven out of the cut or otherwise may fall on the floor, passes down through screen-covered openings 62 into channels 63 in the concrete, and washed into the sump-hole or reservoir 64. Here an agitation is maintained by means of a jet of water entering through a nozzle 65, which acts to cleanse the shot of their accumulations of mud, the waste dirty Water flowing off through an outlet, as 66. A suitable elevator 67 conveys the accumulated shot in the sump to the top of the machine and redeposits it in the conveyer-trough 49. The elevator 67 is here shown as of the endless-belt variety and may be driven in unison with the conveyer 55 and from the same source of power by suitable interconnections 68, as shown.

The means for returning to the trough 49 the shot which has been thrown off from the saw as the work progresses is shown in Figs. 1 and 2, wherein the belt conveyer 55 drives the miter-gears G and G which in turn drive the vertical shaft and miter-gears Or at the top of the shaft and G at the bottom of the shaft. These gears in turn drive the mitergears G at the top of the shaft and Cr at the lower end of the shaft, the gear G driving the conveyer 67 and belt conveyer 69. Power to operate these parts is furnished through a motor and is transmitted to the conveyer 55 through the belt 59 and pulley 58. The belt conveyer, drives the miter-gear Gr and conveys shot from the elevator 67 along the bottom of the trough to be fed through the valves 50 and telescopic tubes 51 52 53 and the hollow bolts 41. passes the last valve 50 is conveyed to the end of the conveyer-trough 49 and being carried up the curved end wall thereof is dropped down the vertical tube into the lower conveyer 69 and carried to the sump.

It is manifest that the foregoing construction is capable of various changes and modifications without necessarily departing from the principle of the invention, and we do not wish to be understood as limiting ourselves to the construction here shown and described.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. A stone-sawing machine having in combination a reciprocable saw-bar having passages opening below the bar between the sawblades, a source of shot-supply, and flexible connections between said source of supply and said passages in the saw-bar said connections having their lower ends fitted to and movable with the bar whereby the shot is delivered into the path of the blades.

2. A stone-sawing machine having in combination a reciprocable saw-bar having passages opening below the bar between the sawblades, a source of shot-supply, flexible connections between the source of supply and said passages in the saw-bar, said connections having their lower ends fitted to and movable with the bar, valves in said connections, and means for returning the used shot to the source of supply.

3. In a stone-sawing machine, the combina tion of a reciprocable saw-bar having passages opening below the bar between the saw-blades and saw-blades carried by said bar, means for delivering shot to the said blades, said means including an overhead conveyer extending parallel with the'saw-support, valved connections between the conveyer and the passages in the saw-bar and discharging into the path of and between the saw-blades, a reservoir subjacent to the saw arranged to receive the shot discharged by the saw and means for antomatically returning the shot from said reservoir to said overhead conveyer.

4. In a stone-sawing machine, the combination of a reciprocable saw-bar having passages opening below the bar between the saw-blades, saw-blades carried by said bar, means for delivering shot into the path of the saw-blades, said means including an overhead trough, said trough having valved outlets in its bottom, flexible connections between said outlets and discharging into the path of and between the The surplus shot thatsaw-blades, a shot-carrier in said trough, a reservoir subjacent to the saw bar and arranged to collect the shot discharged by the saw-blades, and means for returning the shot from the reservoir to said trough.

5. In a stone-sawing machine,'the combination of a reciprocable saw-bar having passages opening below thebar between the saw-blades, saw-blades carried by said bar, means for delivering shot into the path of and between the saw-blades, said means including an overhead trough, said trough having valved outlets in its bottom, flexible connections between said outlets and the saw-bar, said connections discharging through said passages in the saw-bar into the path of the saw-blades, a shot-carrier in said trough a reservoir subjacent to the saw and arranged to collect the shot discharged by the saw-blades, means for delivering water with the shot from the trough to the saw, means for washing the shot in the reservoir, and means for returning the shot from the reservoir to the trough.

. 6. In a stone-sawing machine, the combination of a reciprocable saw-bar, saw-blades carried by said bar, means for delivering shot to the saw-blades, said means including an overhead trough, a conveyer therein, valved connections between the trough and the bar discharging into the path of and between the sawblades, means for delivering water along with the shot to the saw-blades, a reservoir subjacent to the saw to collect the shot discharged by the saw, means for washing the shot in the reservoir, a shot-elevator communicating between the reservoir and said trough, means for operating the elevator and the conveyer in said trough in unison, and means for discharging the surplus shot in the trough again into the reservoir.

7. Astone-sawing machine having in combination a reciprocable saw-bar, saw-blades carried by the bar, said bar having passages opening below the bar between the saw-blades a source of shot-supply, and means having one end connected to the shot-supply and the other end fitted to move with the saw-bar,for delivering the shot into said passages in the saw-bar.

8. In a stone-sawing machine, the combina tion with a reciprocable saw bar and sawblades carried thereby, said bar having passages opening below between the saw-blades, of a source of shot-supply and flexible shotconveying means between said source of supply and the passages in said saw-bar, connected directly therewith and discharging into the path of and between the individual saw-blades.

9. In a stone-sawing machine, the combination-with a suitably-supported saw, of a shotconveyer trough above the saw, a shot-reservoir below the saw, means of delivering the shot from the trough to the saw and means for returning the shot from the reservoir to the trough, and means for discharging back into 804,812 r I Q the reservoir the shot in the trough in excess to the saw, said conveyer operating to disof that being fed to the saw. charge said surplus into said connections.

10. In a stone-sawing machine, the combi- In testimony whereof We have hereunto set nation With a suitably-supported saw, of an our hands in presence of two subscribing wit- 5 5 overhead trough to contain shot, a shot-resernesses.

fi dittiififitifiii; Zfiililififiiifififiiifi ggmg g gg veying shot from the reservoir to the trough, a conveyor in the latter, and connections be- Witnesses: 1 tween the trough and conveyer for the return A. G. MILLER, of surplus shot over and above the amount fed C. J. GRIFFIN. 

